Thank you very much Laurent_R, I tried the script and its printing all the rows, instead of duplicates. Laurent_R, this code looks very interesting, can you please explain it

#!/usr/bin/perl

my ($previous_key, $previous_line);
open my $IN, "<", '/home/scripts/imageoutcome.txt' or die "cannot open
+ $infile $!";
while (<$IN>) {
    my $key = $1 if /^(\w+)/;
    if ($key eq $previous_key) {
        print $previous_line if defined $previous_line;
        print $_;
        undef $previous_line;
    } else {
        $previous_line = $_;
    }
    $previous_key = $key;
}

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In reply to Re^4: how to change this code into perl by perlnewbie012215
in thread how to change this code into perl by perlnewbie012215

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